Loss balancing method and device for nonvolatile memory and medium

Abstract

The invention discloses a loss balancing method and device for a nonvolatile memory and a medium. When a small amount of data are written in a physical logic block at a high frequency, a plurality of logic nodes are used for writing from a first byte to a last byte of the physical logic block until the physical logic block is full, and an erasing operation does not need to be carried out every time the data is written. The erasing frequency can be greatly reduced, and the write data can uniformly cover the whole nonvolatile memory, so that the purpose of realizing loss balance in the nonvolatile memory is achieved, and the nonvolatile memory has the advantages of low cost and high efficiency.

Description

Technical field [0001] The present invention relates to the field of data storage, and Background technique [0002] Non-volatile memory devices are exhausted after performing many programming / erase cycles. Non-volatile memory devices have a fast reading speed because of its characteristics, but write data (32KB or 64KB) erase, block erasure requires a few milliseconds, if it is not a balanced, there will be repeated Write the same physical block, which will cause the write data to slow down (because each write operation needs to be erased), and because repeatedly erased the same physical address block, it will cause the physical address block to be first in other physical addresses. Block failure (limited lifetime of the physical address block in the nonvolatile memory), resulting in shortening the life cycle of the entire non-volatile memory device product. [0003] In the related art, there have been a variety of exhaustive balance algorithms to avoid repeated erasing of the...

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Problems solved by technology

[0004] Although in related technologies, there are various wear-leveling algorithms to avoid frequent repeated erasing and writing of the same physical address block, but there are defects of high cost and low efficiency, especially for small amounts of data and high-frequency The situation of writing, for example: in the application of multimedia hardware player, it is necessary to store the playlist in real-time in flash (flash memory) non-volatile memory, which only needs a small non-volatile storage space, such as 2KB space, which is convenient The system (the system here defaults to the computer system) can display the last playlist when it is turned on next time, so the application needs to store the playlist (several bytes to dozens of bytes) in the flash every few seconds, but Using the wear leveling technology of related schemes, the price paid is too high, and the efficiency is also low

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